Cooking apparatus.



PATENTED APR. 2, 1907.

Not 849,318.

V. W. BLANGHARD. COOKING APPARATUS. APPLICATION FILED JAN. 22. 1906.

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v. W. BLANOHARD. 0001mm APPARATUS.

APPLICATION FILED JAN. 22, 1906. 1

2 sums-51mm 2.

UNITED STATES PATENT OFFICE.

VIRGIL w. BLANCHARD, on NEW YORK, N. Y.

COOKING APPARATUS.

. Specification of Letters Patent.

Patented April 2, 1907.

Application a January 22,1906. Serial no: 297.263.

To a/ZZ whom it may concern.-

Be it known that I,VIRGIL W. BLANCHARD, of New York, in the county of New York and State of New York, have invented certain new and useful Improvements in Cooking Apparatus; and I hereby declare that the following is a full, clear, and exact description thereof, reference bein had to the accompa nying drawings,which orm part of this speci.

fication.

Thisinvention is an improvement in cooking apparatus; and its object is to provide a novelh'eat storing or accumulating chamber adapted to be 'attached to gas heating-stoves, but also adapted to store heat supplied there to from any source.

The present invention has particular refera ence to the construction of the heat-accumulating chamber as applied to a gas heatingrange; but when once explained it can' be adapted by those'acquainted therewith to other similar styles of heaters, and while I will show the same as adapted to be used with the said range. I do not limit myself in the broader claims to theparticular form shown and described in the drawings, nor to the use of the in'ventiom in connection with said range. l In the 'drawings,' Figure 1 is a vertical transverse-section through one form of heat.

accumulating or storing chamber. embodying the inventionand showing it as applied to a gas h atin'g stove or range; and Fi 2 is a de tail hhrizon'tal section on line 2 2 of Fig. ,1, in-

dicating a joint between the opposite halves of the casing. Fig. 3? is-a; sectional view showing the connection of-the chamber and the range portion-of the stove.

Iii said drawings,'A designates a section of the range extension of a gas-burning apparatus of any suitable. construction, through which extension the heated products of combust'i on travel horizontal] The range A is connected to theoutlet o a a stove or heater,

(indicated at S in the drawings;) but I have not'deemed it necesssary to show the constructtion of such stove in the drawings. The

saidsetctioncan be connected to aheater of any desired construction adapted to supply large quantities of heated gasesto the flue. The

' upper side of this'flue or section A is provided with an opening a, adapted to be closed by removable covers or plates, and to its underside'are connected oppositelyextended horizontallydisposcd U-shaped brackets A,

which form the supports for the removable heat-accumulating chamber, which is the particular subject of the present invention. Said chamber, as shown, is rectangular in cross-section and is preferably made in o posite halves B B, although it may be ma e in one piece. As shown in the drawin s, it is made in halves for the purpose offaci itating its application to or removal from the stove.

layer (1 of sheetmetal, which may be sheetiron, outside of which is another layer D of asbestos, the layers D and D being quite thick. Outside of the layer D is a sheathing E, of wood, which is surrounded by a layer of non-heat-conducting material e, preferably felt, outside of which is a final casmg or jacket E, which is preferably of wood. The aforesaid several layers of material constitute the vertical walls of the chamber'and may be securel bound together in any suitable manner, eing shown as secured together by wooden screws F in the drawings. The vertical walls of the chamber rest upon the base-plate G, of .wood, between which and. the innermost layer 0 'of metal is a thick layer of asbestos or other conducting material g. v The upper end of the chamber is preferably closed by a cover comprising a wooden plate H, having a lining h of metal provided with a thick depending portion adapted to' closelyfit in the upper end ofthe casing or opening therein after the manner of a tightlyfitting cap or stopper the cover havmg an opening or openings. In each opening in the cover 1s fitted a metallic collar I, having a lateral flange I on its upper end projecting over the top of the wood layer H, so as to support the collar I in position thereon, and around this collar'and filling the space between it and the metallic outer plate It and bottom plate It is a'thick filling ol' nonheat-conducting material .J, preferably asbestos, the whole being so constructed that .the chamber will be closed practically airtight and will be so thick-walledthat heat non-heatmass of cannot escape therefrom by'radiation or conduction, although the inner walls and entire the casing and cover become highly heated and will retain. that heat avery long time; but it cannot escape therefrom by radiation or conduction, and'there will be practically no radiation of heat therethrough exteriorly, although heat will be radiated into the interior of the apparatus from the me tallic plates C and h.

The collar I is provided with an annular on which is supported a griddle ened or protected by angledrons L, as shown with lugs P P, connected with a rabbet in the drawings. If made in sections, as indicated in the drawings, the meeting edges ofthe sections maybe provided, respectively,- m-and a projecting rib m, preferably of non-combustible fiber or other suitable gasket material adapted to make close joint when the sections are fitted together. The sectionsB B can be fastened together in any desired manner. As shown in Fig. 2, they are provided on their meeting edges bya bolt p, fastened bya nut 29. v p In the operation of this device it is applied to or connected with a suitable heatgenerator, such as a gas heating-range S, and

V and suitably closed the cover of opening a 45' may be removed by first opening the valve is an. removing one of the plates 7;, and then, after the hot gases drive out the cold air, the plate i is replaced and the valve or cover partly closed, so that the heated gases entermg said chamber are detained therein, and owing to the thickness of the walls and the amount of metal on the inner surface thereof and the non-heat-conducting layers a great amount of heat is stored up or accumulated in the walls of'said chamber before any heat is noticeable on the outside thereof. In fact, it is practically impossible by applying heat interiorly up to 700 Fahrenheit to 800? Fahrenheit to raise the temperature of the outside casing to any very perceptible degree. W hen the chamber is thoroughly heated, the gas-supply may be cut off an d the inlet therefrom to the chamber may be entirely closed.

casing'may be streh'gthgas-stove, for example,- r g and the drawings illustrate it as connected "-w th the outlet of a .()wing to the great amount of heat stored in the walls of the chamber, it is well adapted for cookingand heating articles which may be placed therein by removing the plates i and opening the valve is, said'plates being replacedand thevalve closed after theartithoroughly cooked by the stored heat, and a 4 large amount of food can be cooked before f the apparatus becomes cool.

' By means of this invention a small amount of fuel consumed in the burner will generate a great quantity of heat, all or most of which is conserved'in the storage-chamber without phere, and by thus'storing the heat units a great deal more service and work can be accomplished with a smaller amount of fuel than can be accomplished in the openranges or furnaces where an excessive expenditure I of fuel is required, owing to the great waste 1 of heat in the escaping gases.

Ifdesired, a small quantity of gas may be continuously supplied to the interior ofthe chamber through the flue, keeping the same continuously full of carbonic-acid gas, whereby the oxidation and burning of aliments placed in the chamber are. prevented and the glenic'manner.

Having thus described my invention, what I therefore claim as new, and desire to secure byv Letters Patent thereon, is-

1.' The herein-described heat-accumulating chamber having its walls constructed with an internal layer of metal, a layer of asbestos, a second metal lining, a second layer of asbestos, a layer of wood, and a layer of felt, and an outer' layer of wood.

2. The combination of a gas-supply'flue,

U-shaped supports attached to the under side of said flue, and'a" heat-accumulating chamber surrounding said flue and mounted on said supports, said chamber having its walls constructed to prevent loss of heat exterior conduction or radiation.

3. The combination with a heat-accumulating chamberhaving an outlet in its top, of a closure for said outlet, comprising a wood plate having a lining of metal and an opening, an annular metallic collar fitted in said opening, an asbestos packing surrounding said collar, a griddle supported on said collar, a platefor closing the opening in said collar, having an ture.

In testimony that I claim the foregoing as my own I affix my signature in presence of two witnesses.

, VIRGIL W. BLANOHARD.

Iii-presence of- JAMES R. MANSFIELD,

L. E. WITHAM.

cles are in the oven, and the articles can be articles of food will be cooked in a more hyaperture and a valve for said aperbeing permitted to waste into the atmos' 

